
  .Basis-TreeNode_Expander
  {
    position: absolute;
    top: 0;
    left: 2px;
    width: 9px;
    height: 1.5em;
    background: url(res/minus.gif) no-repeat center center;
    background-image: url();
    cursor: pointer;
  }

  .Basis-TreeNode_Expander__collapsed
  {
    background-image: url(res/plus.gif);
    background-image: url();
  }